Hey, I installed a copy of MediaWiki on my server and everything was running fine. It has a subfolder images/ which has several subfolders. I uploaded some images through the MediaWiki and everything was working fine. At one point though, the subfolders of the images/ directory were completely blocked.
I don't just want to modify the access rights of the folders directly because it might happen again and I would like to find the cause.
Here are the Apache Error Messages when attempting to upload a file:

Warning: move_uploaded_file(C:\xampp\htdocs\cw/images/temp/f/f3/20050615101559!Overview.jpg) [function.move-uploaded-file]: failed to open stream: No such file or directory in C:\xampp\htdocs\cw\includes\SpecialUpload.php on line 343

Warning: move_uploaded_file() [function.move-uploaded-file]: Unable to move 'C:\DOCUME~1\pfeiffks\LOCALS~1\Temp\php22.tmp' to 'C:\xampp\htdocs\cw/images/temp/f/f3/20050615101559!Overview.jpg' in C:\xampp\htdocs\cw\includes\SpecialUpload.php on line 343

Some people told me the problem could be that Apache is running in Safe Mode. This is not the case though.